389866 has 4 divisors (see below), whose sum is σ = 584802. Its totient is φ = 194932.

The previous prime is 389849. The next prime is 389867. The reversal of 389866 is 668983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668983 = 7 ⋅95569.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 4225 = 621^2 + 65^2 .

It is not an unprimeable number, because it can be changed into a prime (389867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97465 + ... + 97468.

2³⁸⁹⁸⁶⁶ is an apocalyptic number.

389866 is a deficient number, since it is larger than the sum of its proper divisors (194936).

389866 is a wasteful number, since it uses less digits than its factorization.

389866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194935.

The product of its digits is 62208, while the sum is 40.

The square root of 389866 is about 624.3925047596. The cubic root of 389866 is about 73.0530670621.

The spelling of 389866 in words is "three hundred eighty-nine thousand, eight hundred sixty-six".